Quote:
Originally Posted by zeno
The trouble makers are the hoz output. Its called a gate controlled switch.
They are marked SG-### and are on a heat sink on the HV board.
It takes nothing to blow one & some other parts. Finding the actual
cause is sometimes imposable. When I was at Sony service they would
often change the whole HV board to get one right. That was the mid 70's
and almost nobody would touch one. Those that did charged $125 + parts
sometimes the bill went over $200, a lot back then.
73 Zeno 
LFOD ! |
A while back Shango had one of these that kept eating all of the semiconductors in the HO section. After lots of back and forth he tracked it down to a broken - what do you call it, wire? bracket? clamp? - through the flyback core. I can't remember the whole reason this caused it to happen; it was a really complicated circuit.